For years, numerous commercial open source startups have used a Mozilla
Public License (MPL)-plus-attribution clause to hock their wares. Open
source aficionados have long argued that this type of license, which
adds an attribution for a "powered by" type of notation in the application,
is not an approved OSI license and so is not technically open source.

The OSI and its backers have argued that, by definition, being open source
requires the blessing of the OSI. CPAL was recently approved by the OSI and
has been blessed as bona fide open source goodness.

But there is little difference between what the vendors were
doing before with Mozilla-plus-attribution versus what they get with CPAL.

"There is an additional paragraph in the CPAL that we didn't have in the
MSPL [MuleSource public license]," MuleSource CEO Dave Rosenberg told
Internetnews.com. "Otherwise it's the same."

Xtuple President and CEO Ned Lilly explained that, though the license isn't
all that different from what his firm was doing, the OSI's blessing
actually does mean something.

"I think it means a lot more in this particular situation since they have
officially blessed a successor to MPL+A [Mozilla public license plus
attribution]," Lilly said. "I'm happy that xTuple can be full-fledged
members of the open source applications community without any kind of
asterisk or hard feelings; and we're all indebted to Socialtext and the OSI
board for working this through to a successful conclusion."

For its part, Socialtext Director of Product Marketing Jeff Brainard said
that wide adoption of CPAL was one of its goals in getting it approved by
the OSI.

"It was a long process, but rewarding for Socialtext to follow the community
process to achieve full OSI certification. Now, we can truly say our wiki
software is open-source," Brainard said. "We hope that we've solved the
problem for the industry at large to help more commercial software packages
become part of the open source movement."

At a
panel during LinuxWorld, SugarCRM CEO John Roberts argued that the
blessing of the OSI isn't as important as some believe. SugarCRM was among
the very first vendors to go the MPL plus attribution route and has been at
odds with the OSI ever since.